Showing papers in "International Journal of Biological Macromolecules in 1997"

TL;DR: The question of the specifications required by a polymer for applications in some biomedical areas will be discussed and the properties of alginate solutions and gels suggest biomedical and pharmaceutical uses.

TL;DR: The purpose of these measurements was to study the correlation between the three-dimensional organization of BSA native protein structure and its thermodynamic stability and to clarify the non-covalent interactions between the globular proteins and amphipathic molecules.

TL;DR: Among natural carrageenans, the mu/v-type IC3 shows the best relationship between antiviral efficacy and lack of anticoagulant action, resulting a very promising compound.

TL;DR: The storage modulus (G') determined at a cation/polymer ratio was always higher for kappa- than for iota-carrageenan, and for large salt concentrations, G' became independent of the type and concentration of cations in the kappa carrageenan solution.

TL;DR: The unfolding process of human serum albumin was studied by thermal effect on the native fluorescence of the protein, thermal inactivation of the hydrolase activity of albumin and differential scanning calorimetry using the high sensitive calorimeter developed by Privalov.

TL;DR: High growth temperatures probably facilitate amylopectin crystallisation and increase gelatinisation temperatures, but delay the onset and depress the extent of swelling of granules when heated in water.

TL;DR: Both results indicate that the stiffness and conformations of small molecular weight chitosans were more stiff and extended, respectively, than higher molecular weight ones, and that molecular weight-induced conformational transition occurred.

TL;DR: There is no requirement to appeal to 'bound water' to explain any of the properties of water in polysaccharide gels, according to an analysis of the possible modes of motion.

TL;DR: Results are consistent with a collapse of the polysaccharide aggregates and showed that the polymers aggregated intermolecularly and displayed a compact globular structure in dilute solution.

TL;DR: Gelatin gel properties have been studied and results are consistent with the hypothesis of the presence of junction zones of various lengths, the thermostability of which being proportional to their lengths.

TL;DR: Solid state 13C NMR measurements of cork, before and after suberin removal, showed that aliphatic suber in is spatially separated from carbohydrate and lignin and experiences higher motional freedom.

TL;DR: High resolution imaging of wheat and potato starch granule surfaces has been performed using low-voltage scanning electron microscopy and atomic force microscopy to demonstrate that the two starch types possess substantially different surface topologies.

TL;DR: Using atomic force microscopy to image K-carrageenan association in hydrated films and simple experimental and image processing methods have been used to enhance molecular structure in 'rough' cell wall surfaces.

TL;DR: The decrease of metal uptake with an increase of DA and the lack of influence of ionic strength, confirm the results obtained with pH and allow us to suppose the formation of a complex with chitosan amino groups rather than interactions of an electrostatic nature.

TL;DR: These polymers in the adhesive matrix between microfibrils and/or cellulose layers ensure that cracks propagate along the matrix rather than across the fibres and play an important role in allowing flax fibres to approach the tensile strength of advanced synthetic fibres like carbon and Kevlar.

TL;DR: Perturbation of the absorption spectrum of PEGs confirms that at high temperature the polymers preferentially interact with the denatured state of albumin, but is excluded from the native state at low temperature, consistent with the fact that PEG is hydrophobic in nature.

TL;DR: Information about glycaemic response can eliminate the need to systematically forbid all sugars and sweet foods, and thus in an apparent paradox, to respect both food behavior and enjoyment alongside compliance with dietary advice.

TL;DR: Mixtures of the added salts NaI and CsI can be used to gradually `tune' the propensity of κ-carrageenan (KC) helices to aggregate in solution to resolve the molecular events by which helix formation, under certain conditions, leads to gelation.

TL;DR: The role of the nature and concentration of counterions and coions on the conformation of kappa-carrageenan is discussed in this article, particularly, that of iodide compared with chloride based on the results obtained from optical rotation, viscometry and microcalorimetry.

TL;DR: There is an increasing body of evidence to support the notion that the (1 --> 3,1 --> 4)-beta-glucan endohydrolases from germinated barley evolved from the pathogenesis-related (1 ― 3 --> 3)- beta-GLucanases which are widely distributed in plants and which hydrolyse polysaccharides that are abundant in fungal cell walls.

TL;DR: The aim of this review is to suggest that the strategies developed by toxins to insert in a lipid membrane is mediated by their structure.

TL;DR: The hot acid extract of pea hull, HSP, was rich in galacturonic acid, arabinose and xylose; it was fractionated by copper precipitation followed by ion-exchange chromatography and could be partially degraded by endo-polygalacturonase but not by endO-xylanase and seemed to contain xylogalacturonans.

TL;DR: The d-spacings of hydrated RTT and UTLT fell by 0.12 nm and 0.19 nm, respectively to values seen when the tissue water content is the maximum possible in the absence of unbound water, which can be explained by the movement of water within the fibril.

TL;DR: From results, it is believed that mesquite gum might be a suitable replacement of gum arabic in arid regions of the world were Prosopis trees have widespread occurrence.

TL;DR: Removal of the succinyl groups was found to dramatically improve pseudoplasticity of the aqueous succinoglycan samples and also increase the cooperativity of the order-disorder transition exhibited by the polysaccharide.

TL;DR: The dynamic rheological properties during gelation, phase transition temperatures and the enthalpy for melting of junction zones in gel networks of different agar fractions were investigated and indicated that both gelling and melting temperatures, storage moduli (G') and the deltaH values of agar gels were mainly correlated with their [eta] values, rather than with 3, 6-anhydro-galactose (3,6-AG) content.

TL;DR: The results suggest that DNA not only adsorbs to collagen but induces the extraordinary fibrillogenesis of collagen.

TL;DR: In this paper, the positions of carboxyl and carbonyl groups in sodium hypochlorite oxidized (HO) and hydrogen peroxide oxidised (PO) potato starches were investigated.

TL;DR: The results suggest that alpha-crystallin is best classified as a mixed protein, and that structural alterations in alpha- Crystallin may be functionally important during terminal differentiation of the lens fiber cells that is accompanied by increased protein concentrations and its role as a chaperone-like protein.

TL;DR: It is found that alcohols including TFE can 'non-specifically' induce helix at high concentrations both in CTX I and polylysine at neutral pH.